(FILES) In a file picture dated 03 April 2006, Iran's elite Revolutionary Guard special forces participate in military manoeuvers at an undisclosed location near the Gulf. Iran's Revolutionary Guards, set to be the target of unilateral US sanctions, is a fiercely committed force whose influence has extended beyond the military into politics and the economy. AFP PHOTO/FARS NEWS/STR (Photo credit should read -/AFP/Getty Images)

Since they were dispatched to Syria to buttress the Assad regime’s forces in lethal battles over the northern city of Aleppo in mid-March, Iran’s Special Forces have reportedly been suffering heavy casualties.

On Tuesday, the al-Qaida affiliated Nusra Front, which is playing a pivotal role in the fighting that has been taking place in the strategic village of al-Eis in southern Aleppo, released a video purportedly…